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Finding the Fourth Proportional to 340,035.40, 509,615.70 and 206,774.20

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Solution

The fourth proportional to 340,035.40, 509,615.70 and 206,774.20 is: 309,895.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,035.40 : 509,615.70 = 206,774.20 : x
  2. Step 2: Convert to fraction form
    340,035.40/509,615.70 = 206,774.20/x
  3. Step 3: Cross multiply
    340,035.40x = 509,615.70 × 206,774.20
  4. Step 4: Simplify right side
    340,035.40x = 105,375,378,674.94
  5. Step 5: Solve for x
    x = 105,375,378,674.94/340,035.40
  6. Step 6: Final answer
    x = 309,895.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.